400MPa级超细晶粒钢的力学性能  

Mechanical Properties of 400MPa Ultra-fine Steel

作　　者：赵志华[1] 杜林秀[1] 胡燕慧[1] 刘相华[1] 王国栋[1] 孙建伦[2] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [2]鞍山钢铁集团公司技术中心,辽宁鞍山114002

出　　处：《机械工程材料》2004年第10期35-37,40,共4页Materials For Mechanical Engineering

基　　金：国家863计划资助项目(2001AA332020)

摘　　要：通过单轴拉伸、低温系列冲击和宽冷弯试验,对ANS400超细晶粒钢的力学性能及其组织性能关系进行分析研究。结果表明:ANS400超细晶粒钢的铁素体晶粒尺寸在3-5μm,且组织中有一定量的贝氏体,屈服强度可达430MPa以上,抗拉强度可达530MPa以上,具有优良的塑性和低温韧性。组织中贝氏体的存在使材料在提高强度的同时具有良好的加工硬化能力。The mechanical properties of ultra-fine steel were investigated through tensile tests, cold-bend test and impact test. The properties-microstructure relationship was analysed. The experimental results showed that the ferrite grain size of ANS400 ultra-fine steel could reach to 3-5μm, yield strength was beyond 430MPa, tensile strength was beyond 530MPa and there was a little bainite in its microstructure. The steel had good plasticity and low-temperature toughness. The existence of bainite improved the steel's strength while having good work-hardening capacity.

关 键 词：力学性能 超细晶粒 强度 塑性 韧性 

分 类 号：TG142.41[一般工业技术—材料科学与工程] TG115.5[金属学及工艺—金属材料]